Process and device for measuring the optical properties of spectacle lenses by means of an optical detector of engravings in the spectacle lenses

摘要

An apparatus for detecting parameters of an ophthalmic lens including a vertex refractometer having a lens support for the ophthalmic lens and a detection device for optical detection of at least one engraved marking on at least one predetermined surface area of the ophthalmic lens. The vertex refractometer has a measurement beam path which passes through the ophthalmic lens when the ophthalmic lens is lying on the lens support and the detection device has at least one light source, an imaging optical system for directing light from the at least one light source onto the at least one predetermined surface area of the ophthalmic lens with at least one engraved marking, and an optical receiver system having a light sensor which is connected to an evaluation and representation unit. The optical receiver system images light beams from the imaging optical system which are reflected from the at least one predetermined surface area of the ophthalmic lens. The vertex refractometer and the detection device are disposed so that a spacing between an axis of the measurement beam path of the vertex refractometer and an axis of the optical receiving system of the detection device is selected so that with the ophthalmic lens being positioned relative to the measuring beam path passing through the ophthalmic lens, the at least one predetermined surface area with the at least one engraved marking of the ophthalmic lens is illuminated by the at least one light source.